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Which ordered pair is a solution to [tex]$y = 7x - 3$[/tex]?

A. [tex](-2, -17)[/tex]
B. [tex](2, 7)[/tex]
C. [tex](-2, 11)[/tex]
D. [tex](2, 14)[/tex]


Sagot :

To determine which ordered pair is a solution to the equation [tex]\( y = 7x - 3 \)[/tex], we need to test each pair by substituting [tex]\( x \)[/tex] and [tex]\( y \)[/tex] values into the equation and checking for equality.

Let's go through each ordered pair one by one:

1. Ordered pair [tex]\( F(-2, -17) \)[/tex]:
- Substitute [tex]\( x = -2 \)[/tex] into the equation:
[tex]\[ y = 7(-2) - 3 \][/tex]
Simplify the expression:
[tex]\[ y = -14 - 3 = -17 \][/tex]
- Since [tex]\( y = -17 \)[/tex] matches the value in the pair, [tex]\( F(-2, -17) \)[/tex] is indeed a solution to the equation.

2. Ordered pair [tex]\( H(2, 7) \)[/tex]:
- Substitute [tex]\( x = 2 \)[/tex] into the equation:
[tex]\[ y = 7(2) - 3 \][/tex]
Simplify the expression:
[tex]\[ y = 14 - 3 = 11 \][/tex]
- Since [tex]\( y = 11 \)[/tex] does not match the value in the pair [tex]\( H(2, 7) \)[/tex], this pair is not a solution.

3. Ordered pair [tex]\( G(-2, 11) \)[/tex]:
- Substitute [tex]\( x = -2 \)[/tex] into the equation:
[tex]\[ y = 7(-2) - 3 \][/tex]
Simplify the expression:
[tex]\[ y = -14 - 3 = -17 \][/tex]
- Since [tex]\( y = -17 \)[/tex] does not match the value in the pair [tex]\( G(-2, 11) \)[/tex], this pair is not a solution.

4. Ordered pair [tex]\( I(2, 14) \)[/tex]:
- Substitute [tex]\( x = 2 \)[/tex] into the equation:
[tex]\[ y = 7(2) - 3 \][/tex]
Simplify the expression:
[tex]\[ y = 14 - 3 = 11 \][/tex]
- Since [tex]\( y = 11 \)[/tex] does not match the value in the pair [tex]\( I(2, 14) \)[/tex], this pair is not a solution.

Therefore, the only ordered pair that is a solution to the equation [tex]\( y = 7x - 3 \)[/tex] is [tex]\( F(-2, -17) \)[/tex].
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